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Low-repetition-frequency precise speed measurement method based on multiple carrier frequencies

A low repetition frequency, multi-carrier frequency technology, applied in the field of low repetition frequency accurate speed measurement based on multi-carrier frequency, can solve problems such as ambiguity, and achieve the effect of accurate speed measurement

Inactive Publication Date: 2018-05-08
BEIJING INST OF REMOTE SENSING EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a low-repetition-frequency accurate speed measurement method based on multiple carrier frequencies to solve the problem of ambiguity in the existing speed measurement methods under low repetition frequency conditions

Method used

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Embodiment Construction

[0023] The specific steps of a low-repetition-frequency accurate speed measurement method based on multiple carrier frequencies are:

[0024] The first step is to build a low repetition frequency accurate speed measurement system based on multiple carrier frequencies

[0025] A low-repetition-frequency accurate speed measurement system based on multiple carrier frequencies, including: a fuzzy Doppler frequency acquisition module, a signal processing module and a target radial velocity calculation module. Said:

[0026] The function of the fuzzy Doppler frequency acquisition module is: to obtain the fuzzy Doppler frequency of each carrier frequency;

[0027] The function of the signal processing module is to perform differential processing on the fuzzy Doppler frequency;

[0028] The function of the target radial velocity calculation module is to calculate the target radial velocity.

[0029] The second step: the fuzzy Doppler frequency acquisition module acquires the fuzzy ...

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Abstract

The invention discloses a low-repetition-frequency precise speed measurement method based on multiple carrier frequencies. The method comprises the steps: constructing a low-repetition-frequency precise speed measurement system based on multiple carrier frequencies, wherein the constructed system comprises a fuzzy Doppler frequency acquisition module, a signal processing module and a target radialvelocity resolving module; obtaining the fuzzy Doppler frequency of each carrier frequency through the fuzzy Doppler frequency acquisition module; carrying out the differential processing of the fuzzy Doppler frequencies through the signal processing module, and resolving the radial speed of a target through the target radial velocity resolving module. The method can achieve the resolving of theradial speed of a radar pointing to the target under the condition that echo Doppler frequency in a low-repetition-frequency system is fuzzy severely through the Doppler frequency difference of multiple carrier frequencies and the linear relation of linear speed between the radar and the target, and is high in speed measurement precision.

Description

technical field [0001] The invention relates to a precise speed measurement method, in particular to a low repetition frequency precise speed measurement method based on multiple carrier frequencies. Background technique [0002] The low repetition frequency radar has a large range without ambiguity, but there is a serious problem of velocity ambiguity. The pulse repetition frequency of fixed point frequency pulse radar limits the unambiguous range of Doppler frequency measurement, and the radial velocity cannot be accurately measured due to the influence of ambiguity at low repetition frequency. [0003] Existing methods of speed measurement based on Doppler are based on the Doppler frequency of the echo and radial velocity and emitted signal wavelength Relationship , according to the Doppler frequency of the echo to estimate the radial velocity, but this method must satisfy the Doppler measurement without ambiguity, that is, the repetition frequency is higher than ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/58G01S7/41
CPCG01S7/41G01S13/581
Inventor 闫雅琼汤斌陈文东
Owner BEIJING INST OF REMOTE SENSING EQUIP
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